public class Test3 {
    public static void main(String[] args) {
        String s = "Hello";
        char[] ch = s.toCharArray();
        for (int i = 0; i < ch.length; i++) {
            if(ch[i] >= 'A' && ch[i] <= 'Z'){
                ch[i] += 32;
            }
        }
        String newStr = new String(ch);
        System.out.println(newStr);
    }

}
